The chapter opens with a flashback to two years ago, when the two of them were playing a game of "tic-tac-toe" . This time, however, the game is played by a man named Mizuho, who is now married to a woman named Nanba. The flashback is a reminder of a conversation Mizuo had with his father, who was a police officer. The two men reminisce about their childhoods, when they used to play the game of Tic-Tac-Toe together, and they reminisce about the times when they were young and innocent. They also reminisce about how they were both dirtbags, and how they never wanted anything to do with each other again. They talk about the day they were married, and about how their lives have changed since then. They discuss Valentine's Day, which is a week-long inter-station special that is held every year. One year, they were invited to a party, but this year, the party is being held outside the family's home. They play the music they made for the party, which they made while they were away from home.